The body proceeds down the conveyer to an area where interior assembly is performed. Here, technicians install the full range of interior pieces, including the seats, door panels, dashboard, clutch, pedals, lights, radios, mirrors, vents and speakers.
Glass parts are also installed at this stage, including the windshield and door windows. The former is set into place via suction cups at the end of robotic arms, which move the glass panel out of its delivery container and into place at the front of the dashboard. For extra protection, urethane sealer is applied along the edges of the windshield before it’s set into place.
Transportation of the heavier interior components, such as the panels and seats, is also performed by robotic arms. This frees the technicians from some of the more grueling aspects of labor and allows them to instead focus on bolting everything tightly and securely into place. Once the interior is finished and each window is set into frame, the vehicle is passed to another area where it undergoes a water test. The purpose here is to ensure that the doors and windows are tight, snug and foolproof.
Finally, the stage arrives where the body and chassis are joined together. The former is lifted and set down onto the latter via robotic arms, but technicians perform the final acts of assembly. These involve bolting the two components together with pneumatic tools powered by automotive air compressors. The workforce is split between two levels, with some technicians doing their parts at ground level and others operating beneath the vehicle from a work pit. After the bolting is complete, the vehicle is passed down the conveyer to another group of workers who install the battery, apply the tires, pump the gas tank and fill the oil and coolant reservoirs.